Charge indicator: Yes. Fast charging red light long bright red and blue lights flash alternately . Full automatic stop.MPPT function: a. MPPT maximum power point automatic tracking, to maximize the full use of solar charging mppt voltage: adjustable, MPPT solar modules in different voltage is different, even mppt voltage can not tune mppt solar controller, can be called mppt it MPPT control technology using charge sheet charging efficiency ratio control scheme in general or a DC-DC step-down power MCU and PWM lift about 30percent . Make full use of solar energy, and low-power operation. Reduce power loss! MPPT function can effectively prevent the solar panels so that the charging voltage is the battery slow slow death. Low pressure: 1V (as is -down voltage regulator, the input voltage is at least higher than the output 1V) Low power consumption: Yes! Ultra-low pressure designed to achieve low power consumption and high efficiency, professional adaptation of solar panels Charging: automatic intelligent three-stage charging mode. Self-tracking solar power charge current automatically adjust the size. parameters: The modular nature: a real MPPT solar maximum power point tracking, automatic intelligent charge management, low power consumption Input voltage: DC 8-28V input . ( AC input) Output voltage: DC 5-26V stepless transmission For lower output voltage, please contact the owner. 6V battery can be either 12 or 8.4V, 12.6V, 16.8V lithium battery 7.2V, 10.8V, 14.4V lithium iron phosphate battery 2-4 string lithium batteries, lithium iron phosphate charge management board Operating temperature: Industrial grade (-40 to and85) Load regulation: 1percent Voltage regulation: 0.5percent Conversion efficiency: Max: 93percent : 95percent for different lighting conditions vary. No-load current: 3MA even weak morning sunlight can sily start automatically, eliminating manual switch. nput reverse polarity protection: Yes. Exclusively designed ultra-low dropout prevention MOS transistor reverse polarity protection, input reverse is not working. Output reflux protection: Yes. Effectively prevent nocturnal reflux battery electric charge sheet! Connection: There Terminals Note: The first charge in advance regulate the output voltage and please closely monitor the battery voltage to prevent overcharging! Do not unprotected lithium batteries!The slight difference in the words does not affect the use Material: plastic colour: red Package Contents: 1 x MPPT Solar Panel Regulator Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is 1-3cm.